SMCI would be subject to refrain from pre-announce earnings

It seems you're referring to the restriction faced by Supermicro, a company that's been added to the S&P 500 index, on pre-announcing earnings. When a company joins the S&P 500, it must adhere to certain regulations and guidelines set by the index. One of these rules is related to the timing of earnings announcements.

Companies in the S&P 500 are typically not allowed to pre-announce earnings. This is to maintain fairness and transparency in the market, ensuring that all investors have access to the same information at the same time. Pre-announcing earnings could potentially give an advantage to certain investors, leading to unfair trading practices.

So, if Supermicro has recently been added to the S&P 500, it would likely be subject to this rule and would have to refrain from pre-announcing its earnings.